Average Bench: 118% (181st of 1058)

Based on 11,427 user benchmarks.  Models: NVMe PM951 NVMe SAMSU, PM951 NVMe SAMSUNG 256GB

Outstanding average bench

The Samsung PM951 NVMe PCIe M.2 256GB averaged 17.7% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung PM951 NVMe PCIe M.2 256GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 349MB/s
Avg. 4K-64Thread Read Speed 798MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Samsung PM951 NVMe PCIe M.2 256GB is 68.7%. This is a particularly wide range which indicates that the Samsung PM951 NVMe PCIe M.2 256GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 228MB/s
Avg. Sequential Write Speed 260MB/s

Average Bench

(Based on 11,427 samples)
Min Avg Max
550 Read 893 1,039
108 Write 260 309
157 Mixed 285 353
65.9 SusWrite 228 300
91.1% 417 MB/s
Min Avg Max
17.1 4K Read 35.6 41.7
38.6 4K Write 108 154
13.1 4K Mixed 30.9 40.1
151% 58.2 MB/s
Min Avg Max
276 DQ Read 798 988
89 DQ Write 256 315
129 DQ Mixed 349 427
304% 468 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
162GB free (System drive)
Firmware: BXV77D0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 295 294 289 285 290 289 MB/s
Read 961
Write 303
Mixed 341
SusWrite 290
104% 474 MB/s
4K Read 37.5
4K Write 128
4K Mixed 37.9
173% 67.7 MB/s
DQ Read 964
DQ Write 310
DQ Mixed 421
367% 565 MB/s
56GB free (System drive)
Firmware: BXV77D0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 198 172 157 152 151 146 MB/s
Read 965
Write 271
Mixed 299
SusWrite 163
92% 424 MB/s
4K Read 39
4K Write 126
4K Mixed 36.1
172% 67.2 MB/s
DQ Read 978
DQ Write 252
DQ Mixed 359
330% 530 MB/s
10GB free (System drive)
Firmware: BXV77D0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 61 41 37 44 40 38 MB/s
Read 555
Write 116
Mixed 133
SusWrite 43.4
46% 212 MB/s
4K Read 16.3
4K Write 39.4
4K Mixed 14.4
64% 23.4 MB/s
DQ Read 178
DQ Write 93.4
DQ Mixed 160
112% 144 MB/s
11,427 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 44,074,796 SSDs tested.

Typical PM951 NVMe PCIe M.2 256GB Builds (Compare 1,465 builds) See popular component choices, score breakdowns and rankings.
Gaming 10%
Tree trunk
Desktop 63%
Workstation 10%
Tree trunk

System: Alienware 15 R2


Popular PM951 NVMe PCIe M.2 256GB systems:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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  • - CPU tests include: integer, floating and string.
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  • - Reports are generated and presented on userbenchmark.com.
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Solid State Drive Rankings (Price vs Performance) June 2021 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


Added n/a ago.


3 years ago.

Fast as heck...at half speed I might add!

1058 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-11400F $220Nvidia RTX 3070 $500Crucial MX500 250GB $40
Intel Core i5-11600K $259Nvidia RTX 3060-Ti $400Samsung 850 Evo 120GB $78
Intel Core i7-11700K $380Nvidia RTX 3080 $700Samsung 860 Evo 250GB $52
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $95SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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